Methods and apparatus to receive and discharge bulk materials are disclosed. An example method for treating gaseous fluid includes filling a device with ceramic granular material, a ceramic heat storage body, a catalyst body and a particle-shaped bulk material including calcium and/or carbon. The method also includes supplying gaseous fluid to be treated into a bulk material container and acting upon the bulk material in the bulk material container with the supplied gaseous fluid while discharging the bulk material out of the bulk material receiving apparatus.